Easily install Google Fonts

Just as I was doing a website mockup exercise in the awesome Sketch app, I noticed that I’m missing a font locally – Open Sans, one of the many open source fonts available on Google Fonts. I went searching for some Sketch plugin to install these fonts easily (which would make sense, since they are often used on the web as they’re free and some of them are really good). I haven’t found a plug-in, but I did find a nice small Mac app that sits in your tray and allows you to easily install Google Fonts: